Liquid separation pipeline components and heat exchange devices

Abstract

The present invention provides a liquid separation pipeline assembly and a heat exchange device. The liquid separation pipeline assembly is provided with a liquid separation chamber, a collecting chamber and a liquid separation channel. The liquid separation channel is used to connect the liquid separation chamber and the collecting chamber, and allows the fluid in the liquid separation chamber to flow into the flat tube chamber through the collecting chamber. At least one baffle element is provided in the collecting chamber, and the baffle element divides the collecting chamber into a plurality of collecting chambers, and each collecting chamber corresponds to a plurality of flat tubes. The present invention divides the collecting chamber into a plurality of mutually spaced collecting chambers by the baffle element, eliminates the phenomenon of secondary mixing or turbulence of the fluid between different regions in the collecting chamber, and prevents the fluids at different positions in the collecting chamber from interfering with each other, thereby overcoming the problem of uneven flow velocity when the fluid flows from different positions in the collecting chamber to the liquid-using device, so that each collecting chamber can uniformly collect the fluid from the liquid separation chamber and uniformly supply it to the liquid-using device, thereby improving the uniformity of the liquid separation of the liquid separation pipeline assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid control, and in particular to a liquid separation pipeline component and a heat exchange device. Background Art

[0002] The liquid separation pipeline assembly is a device that separates the concentrated inflow of fluid to form multiple fluid branches, and can transport the fluids of multiple branches to the liquid-using device respectively. It is provided with a liquid separation chamber for receiving fluid, a manifold chamber for connecting the general liquid device, and a liquid separation channel for connecting the liquid separation chamber and the manifold chamber. The liquid separation effect of the existing liquid separation pipeline assembly is not ideal. After the fluid enters the manifold chamber from the liquid separation chamber through the liquid separation channel, mixed flow will occur in the manifold chamber, and the fluids in different areas of the manifold chamber will mix with each other, so its flow trajectory is disordered, resulting in uneven flow rate of the fluid in the manifold chamber; in addition, since the fluid will be subject to the resistance of the inner wall of the liquid separation chamber, the flow rate of the fluid in the liquid separation chamber changes, and it is impossible to ensure the uniformity of the amount of liquid entering the manifold chamber from different areas of the liquid separation chamber. The above factors make it impossible for the fluid to enter the liquid-using device uniformly from various areas in the manifold chamber, reducing the uniformity of liquid separation of the liquid separation pipeline assembly, making it difficult to achieve uniform diversion, and thus affecting the operation effect of the liquid-using device. Summary of the invention

[0003] In view of this, it is necessary to provide an improved liquid separation pipeline assembly and heat exchange device.

[0004] The present invention provides a liquid separation pipeline component, which is provided with a liquid separation chamber, a collecting chamber and a liquid separation channel. The liquid separation chamber and the collecting chamber are arranged side by side. The liquid separation chamber is used to receive fluid, and the collecting chamber is used to connect with the flat tube chamber of a heat exchange device. The liquid separation channel is used to connect the liquid separation chamber and the collecting chamber, and make the fluid in the liquid separation chamber flow into the flat tube chamber through the collecting chamber; at least one baffle element is arranged in the collecting chamber, and the baffle element divides the collecting chamber into a plurality of collecting chambers, and each collecting chamber corresponds to a plurality of flat tubes.

[0005] In one embodiment, the liquid separation pipeline assembly includes a first tube body and a second tube body, and the first tube body and the second tube body can be assembled with each other to form a liquid separation cavity and a manifold cavity.

[0006] With such arrangement, the assembly of the liquid separation pipeline assembly is achieved by splicing the first connecting pipe and the second connecting pipe together, which is conducive to quick completion of the assembly by the assembling workers and reduces the working hours required for installing the liquid separation pipeline assembly.

[0007] In one embodiment, a liquid separation channel is provided on the first tube body; or, a liquid separation channel is provided on the second tube body; or, half holes are provided on both the first tube body and the second tube body, and the half holes respectively located in the first tube body and the second tube body are spliced ​​together to form the liquid separation channel.

[0008] With such an arrangement, a first tube body or a second tube body with a liquid separation channel pre-opened can be used and spliced ​​to form a liquid separation pipeline assembly, without the need to add additional processes or devices for opening the liquid separation channel after the first tube body and the second tube body are spliced; and the structure of the liquid separation pipeline assembly is simpler.

[0009] In one embodiment, a cross section of the first tube body and / or the second tube body cut along a direction perpendicular to the axis is W-shaped.

[0010] With such an arrangement, the first tube body and / or the second tube body with a W-shaped cross-section can be spliced ​​together to form a liquid separation chamber and a flow collection chamber that are spaced apart from each other, without the need to add other external components to separate the liquid separation chamber and the flow collection chamber, further simplifying the structure and installation process of the liquid separation pipeline assembly.

[0011] In one embodiment, the liquid separation pipeline assembly also includes a liquid separation baffle, the first tube body and the second tube body can be assembled together to form a cavity, the liquid separation baffle is fixed in the cavity and separates the cavity into a liquid separation cavity and a collecting cavity; and a liquid separation channel is opened on the liquid separation baffle.

[0012] With such arrangement, the liquid separation baffle plate enhances the overall rigidity of the liquid separation pipeline assembly, making the first tube body and the second tube body more stable after being spliced; in addition, the processing method for opening the liquid separation channel on the liquid separation baffle plate is simpler, for example, the liquid separation channel can be processed by drilling, and the forming of the liquid separation channel is simpler.

[0013] In one embodiment, the liquid separation baffle is integrally formed with the first tube body or the second tube body; or, the liquid separation baffle, the first tube body and the second tube body are separately provided.

[0014] With such a configuration, when the liquid-separating baffle is integrally formed with the first tube body or the second tube body, the liquid-separating baffle can improve the rigidity of the first tube body or the second tube body; when the first tube body, the liquid-separating baffle and the second tube body are separately configured, the shape and structure of the first tube body, the second tube body and the liquid-separating baffle are simpler and easier to form.

[0015] In one embodiment, the cross section of the first tube body and / or the second tube body cut along a direction perpendicular to the axis is C-shaped, the first tube body and the liquid separation baffle plate are arranged to form a liquid separation cavity, and the second tube body and the liquid separation baffle plate are arranged to form a manifold cavity.

[0016] With such arrangement, the first tube body and the second tube body can be spliced ​​to form a cylindrical or substantially cylindrical liquid separation pipeline assembly, thereby making the overall shape of the liquid separation pipeline assembly more compact and smaller in size.

[0017] In one embodiment, the liquid separation pipeline assembly further includes a capillary, which is fixed in the liquid separation channel. The interior of the capillary is hollow and respectively connects the liquid separation cavity and the manifold cavity.

[0018] With such a configuration, the capillary connects the liquid separation chamber and the collecting chamber to form a liquid separation channel, which facilitates the use of capillaries of different specifications, different diameters or lengths, so as to achieve the effect that the capillary produces different amounts of flow resistance to the fluid at different positions in the liquid separation chamber, thereby eliminating the influence of the flow velocity change caused by friction resistance in the fluid in the liquid separation chamber; in addition, when the liquid separation pipeline assembly adopts a liquid separation tube and a collecting tube, the two ends of the capillary can be respectively plugged into the liquid separation tube and the collecting tube, so as to achieve the connection between the liquid separation chamber and the collecting chamber while achieving the connection between the liquid separation tube and the collecting tube.

[0019] In one embodiment, the capillary is fixed to the inner wall of the liquid separation channel by welding.

[0020] With such an arrangement, the fixed connection between the capillary tube and the liquid dispensing pipeline assembly is more reliable, and the risk of the capillary tube shaking or detaching from the liquid dispensing pipeline assembly due to fluid impact can be reduced.

[0021] In one embodiment, there are multiple liquid separation channels, the number of capillaries is the same as the number of liquid separation channels, and each capillary is respectively arranged in a liquid separation channel; the length of the capillary increases in the direction close to the liquid inlet end of the liquid separation pipeline assembly; and / or the inner diameter of the capillary decreases in the direction close to the liquid inlet end of the liquid separation pipeline assembly; and / or the distance between two adjacent capillaries decreases in the direction close to the liquid inlet end of the liquid separation pipeline assembly.

[0022] With such a configuration, by adjusting the flow resistance of multiple capillaries at different positions to the fluid, the flow velocity of the fluid entering the collecting chamber from the liquid separation chamber tends to decrease in the direction close to the liquid inlet end, thereby offsetting the effect of flow velocity attenuation caused by flow friction in the liquid separation chamber. The fluid flow velocity in different areas of the liquid separation chamber is more uniform, thereby ensuring that the refrigerant can evenly enter the collecting chamber, making the amount of fluid entering each collecting chamber the same or approximately the same, further improving the uniformity of liquid separation in the liquid separation pipeline assembly.

[0023] In one embodiment, there are multiple liquid separation channels, and the flow areas of the multiple liquid separation channels decrease in the direction close to the liquid inlet end of the liquid separation pipeline assembly; and / or, the distance between two adjacent liquid separation channels decreases in the direction close to the liquid inlet end of the liquid separation pipeline assembly.

[0024] With such a configuration, by adjusting the resistance of the liquid separation channels at multiple different positions to the fluid, the fluid flow rate entering the collecting chamber from the liquid separation chamber tends to decrease in the direction close to the liquid inlet end, thereby offsetting the effect of the fluid flow rate attenuation caused by friction in the liquid separation chamber. The fluid flow rates in different areas of the liquid separation chamber are more uniform, so as to ensure that the fluid enters the collecting chamber evenly, so that the amount of fluid entering each collecting chamber is the same or approximately the same, thereby improving the uniformity of the liquid separation pipeline assembly.

[0025] In one embodiment, there are multiple baffle elements, and the multiple baffle elements are evenly distributed along the length direction of the manifold.

[0026] With such an arrangement, the accommodating spaces of the plurality of collecting chambers are of the same or substantially the same size, so that each collecting chamber can evenly supply fluid to the fluid-using device, ensuring that the fluid supply amount is the same or substantially the same.

[0027] The present invention also provides a heat exchange device, comprising a flat tube and any one of the above-mentioned liquid separation pipeline components, the liquid separation pipeline component is provided with a flat tube groove for the flat tube to be plugged in, the flat tube and the liquid separation pipeline component are plugged and fixed, and the flat tube cavity of the flat tube is connected to the collecting cavity.

[0028] In one embodiment, there are multiple flat tubes, and the number of flat tubes connected to each collecting chamber is equal.

[0029] With such an arrangement, after the liquid separation pipeline assembly completes the uniform separation of the refrigerant, the refrigerant in each collecting chamber can be evenly or approximately evenly distributed to each flat tube, so that multiple flat tubes connected to the same collecting chamber can obtain the same or substantially the same amount of refrigerant, thereby significantly optimizing the distribution amount of the refrigerant in the heat exchange device, thereby ensuring that the heat exchange device can perform heat exchange evenly and stably.

[0030] The liquid separation pipeline assembly provided by the present invention divides the collecting cavity into a plurality of mutually spaced collecting chambers by means of a blocking element, which can eliminate the phenomenon of secondary mixing or turbulence of the fluid between different areas in the collecting cavity, prevent the fluids at different positions in the collecting cavity from interfering with each other, thereby overcoming the problem of uneven flow velocity when the fluid flows from different positions in the collecting cavity to the liquid-using device, so that each collecting chamber can evenly collect the fluid from the liquid separation cavity and evenly supply it to the liquid-using device, thereby improving the uniformity of fluid separation by the liquid separation pipeline assembly; in addition, the size of the liquid separation cavity is no longer limited by the size of the collecting cavity, and thus a larger liquid separation cavity can be set for temporary storage of the fluid, and when the flow velocity of the fluid entering the liquid separation cavity fluctuates or is interrupted, the fluid stored in the liquid separation cavity can continue to flow and be supplied to the collecting cavity, thereby avoiding the phenomenon of interruption when the refrigerant flows to the collecting cavity or the liquid-using device, and thus the liquid-using device can operate stably and continuously. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 An exploded view of a liquid dispensing pipeline assembly according to a first embodiment of the present invention;

[0032] Figure 2 It is a structural schematic diagram of a heat exchange device according to a first embodiment of the present invention;

[0033] Figure 3 for Figure 2 A schematic diagram of a heat exchange device from a first perspective is shown;

[0034] Figure 4 for Figure 2 A schematic diagram of the heat exchange device from a second perspective;

[0035] Figure 5 for Figure 1 The schematic diagram of the liquid dispensing pipeline assembly shown is in a first viewing angle;

[0036] Figure 6 for Figure 5 The schematic diagram of the liquid dispensing pipeline assembly cut along the AA plane is shown;

[0037] Figure 7 for Figure 6 The partial enlarged schematic diagram of the liquid dispensing pipeline assembly at position I is shown;

[0038] Figure 8 This is a schematic structural diagram of a liquid dispensing tube according to a first embodiment of the present invention;

[0039] Fig. 9 A schematic diagram of the structure of a collector according to a first embodiment of the present invention;

[0040] Fig.10 An exploded view of a liquid dispensing pipeline assembly according to a second embodiment of the present invention;

[0041] Fig.11 It is a structural schematic diagram of a heat exchange device according to a second embodiment of the present invention;

[0042] Fig.12 for Fig.11 The schematic diagram of the heat exchange device shown is in a first viewing angle;

[0043] Fig.13 for Fig.12 The schematic diagram of the heat exchange device shown is cut along the BB plane;

[0044] Fig.14 for Fig.13 A partial enlarged view of the heat exchange device at position X shown;

[0045] Fig.15 An exploded view of a liquid dispensing pipeline assembly according to a third embodiment of the present invention;

[0046] Fig.16 It is a schematic structural diagram of a heat exchange device according to a third embodiment of the present invention;

[0047] Fig.17 for Fig.16 The schematic diagram of the heat exchange device shown is in a first viewing angle;

[0048] Fig.18 for Fig.17 The schematic diagram of the heat exchange device shown is cut along the CC plane;

[0049] Fig.19 for Fig.18 A partial enlarged view of the heat exchange device at position Z is shown.

[0050] 100, liquid separation pipeline assembly; 10, liquid separation cavity; 11, liquid separation pipe; 111, first liquid separation opening; 12, liquid inlet end; 13, liquid inlet elbow; 20, collecting cavity; 21, collecting pipe; 211, second liquid separation opening; 22, baffle element; 23, collecting chamber; 24, first tube body; 25, second tube body; 26, spacer; 27, flat tube groove; 30, liquid separation channel; 31, capillary; 40, liquid separation baffle; 200, heat exchange device; 201, heat exchange panel; 210, flat tube; 211, flat tube cavity; 220, fin; 230, liquid outlet pipe; 240, liquid outlet elbow; 250, side plate. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more related listed items.

[0053] See also Figure 1 to Figure 2 , Figure 10 to Figure 11 , Figure 15 to Figure 16 . Figure 1 An exploded view of the liquid dispensing pipeline assembly 100 according to the first embodiment of the present invention; Figure 2 It is a schematic structural diagram of a heat exchange device 200 according to a first embodiment of the present invention; Fig.10 An exploded view of a liquid dispensing pipeline assembly 100 according to a second embodiment of the present invention; Fig.11 is a schematic structural diagram of a heat exchange device 200 according to a second embodiment of the present invention; Fig.15 An exploded view of a liquid dispensing pipeline assembly 100 according to a third embodiment of the present invention; Fig.16 FIG. 2 is a schematic structural diagram of a heat exchange device 200 according to a third embodiment of the present invention.

[0054] The liquid separation pipeline assembly is a device that divides the concentrated inflow of fluid and forms multiple fluid branches, so that the fluids of the multiple branches are transported to the liquid-using devices respectively. It is mainly used in the refrigerant circulation system of air-conditioning equipment to separate the refrigerant, and transport the multiple branch refrigerants formed after separation to the flat tubes in the heat exchanger, so that the flat tube cavity is filled with refrigerant to achieve heat exchange, and then achieve air cooling or heating. It can be understood that the liquid separation pipeline assembly can also be used in other occasions or technical fields, such as precision irrigation equipment, and can be installed and used in combination with other liquid-using devices. The following description takes the liquid separation pipeline assembly used in air-conditioning equipment as an example, and the implementation methods of the liquid separation pipeline assembly in other occasions or fields will not be repeated.

[0055] The present invention provides a liquid separation pipeline assembly 100, which can be plugged into and fixed with multiple flat tubes 210, and is used to evenly separate the refrigerant and transport it to the flat tube cavities 211 of the multiple flat tubes 210; the liquid separation pipeline assembly 100 is provided with a liquid separation cavity 10, a collecting cavity 20 and a liquid separation channel 30, the liquid separation cavity 10 and the collecting cavity 20 are arranged side by side, the liquid separation channel 30 is used to receive the refrigerant, the collecting cavity 20 is used to connect the flat tube cavity 211 of the heat exchange device 200, and the liquid separation channel 30 is used to connect the liquid separation cavity 10 and the collecting cavity 20, and make the fluid in the liquid separation cavity 10 flow into the flat tube cavity 211 through the collecting cavity 20.

[0056] It should be noted here that when the liquid separation pipeline assembly 100 is used in other application scenarios or technical fields and connected to other types of liquid-using devices, the liquid separation pipeline assembly 100 can also separate other types of fluids and is not limited to separating refrigerants; and the liquid-using device can also be other devices other than the flat tube 210 or the heat exchange panel including the flat tube 210.

[0057] The liquid separation effect of the existing liquid separation pipeline assembly is not ideal. After the fluid enters the manifold chamber from the liquid separation chamber through the liquid separation channel, mixed flow will occur in the manifold chamber, and the fluids in different areas of the manifold chamber will mix with each other, so their flow trajectories are disordered, resulting in uneven flow rate of the fluid in the manifold chamber; in addition, since the fluid will be subject to the resistance of the inner wall of the liquid separation chamber, the flow rate of the fluid in the liquid separation chamber will change, and it is impossible to ensure the uniformity of the amount of liquid entering the manifold chamber from different areas of the liquid separation chamber. The above factors make it impossible for the fluid to enter the liquid-using device uniformly from various areas of the manifold chamber, reducing the uniformity of liquid separation of the liquid separation pipeline assembly, making it difficult to achieve uniform flow separation, and thus affecting the operation effect of the liquid-using device.

[0058] In view of this, the liquid dispensing pipeline assembly 100 provided by the present invention further includes a baffle element 22. Figures 3 to 9 , and see Fig.10 as well as Fig.15 . Figure 3 for Figure 2 A schematic diagram of the heat exchange device 200 from a first perspective is shown; Figure 4 for Figure 2 A schematic diagram of the heat exchange device 200 from a second viewing angle is shown; Figure 5 for Figure 1 The schematic diagram of the liquid dispensing pipeline assembly 100 shown is in a first viewing angle; Figure 6 for Figure 5 The schematic diagram of the liquid dispensing pipeline assembly 100 cut along the AA plane is shown; Figure 7 for Figure 6 The partial enlarged schematic diagram of the liquid dispensing pipeline assembly 100 at position I is shown; Figure 8 This is a schematic structural diagram of a liquid dispensing tube 11 according to a first embodiment of the present invention; Fig. 9 This is a schematic structural diagram of a collector 21 according to a first embodiment of the present invention; Fig.10 An exploded view of a liquid dispensing pipeline assembly 100 according to a second embodiment of the present invention; Fig.15 FIG. 1 is an exploded view of a liquid dispensing pipeline assembly 100 according to a third embodiment of the present invention.

[0059] At least one blocking element 22 is disposed in the collecting cavity 20, and the blocking element 22 divides the collecting cavity 20 into multiple collecting chambers 23. Two adjacent collecting chambers 23 are blocked by the blocking element 22 and cannot be directly connected. When the liquid separation pipeline assembly 100 is plugged and fixed with the multiple flat tubes 210, each blocking element 22 makes each collecting chamber 23 correspond to the multiple flat tubes 210, and the refrigerant in each collecting chamber 23 can flow into the corresponding multiple flat tubes 210.

[0060] After the refrigerant enters the multiple manifolds 23 through the liquid separation channel 30, the fluid in each manifold 23 is separated from the fluid in other manifolds 23. Such a configuration can eliminate the phenomenon of secondary mixing or turbulence of the refrigerant between different areas in the manifold 20, prevent the refrigerants from interfering with each other, and overcome the problem of uneven speed when the refrigerant flows into the flat tube from different positions in the manifold 20; each manifold 23 can uniformly collect the refrigerant from the liquid separation chamber 10, and uniformly supply the refrigerant to the flat tube 210, thereby improving the uniformity of liquid diversion by the liquid separation pipeline assembly 100.

[0061] Furthermore, in order to ensure that the refrigerant can flow into the flat tubes 210 uniformly from each area of ​​the manifold 20, that is, to ensure that the amount of refrigerant flowing into the corresponding flat tubes 210 in each manifold 23 is the same or substantially the same, the number of the baffle elements 22 is multiple, and the multiple baffle elements 22 are evenly distributed along the length direction of the manifold 20, that is, the intervals between two adjacent baffle elements 22 are the same or substantially the same. In this way, the accommodating spaces of the multiple manifolds 23 are the same or substantially the same in size, so that the amount of refrigerant entering each flat tube 210 is substantially the same.

[0062] The liquid separation pipeline components of existing air-conditioning equipment usually adopt a connection method in which the collecting pipe is coaxially sleeved with the liquid separation pipe. In order to ensure that the liquid separation pipe is smoothly inserted into the collecting pipe, the outer diameter of the liquid separation pipe is smaller than the inner diameter of the collecting pipe. The difference in the diameters of the two pipes is large, which makes the volume of the liquid separation cavity of the liquid separation pipe significantly smaller than the volume of the collecting cavity of the collecting pipe. Therefore, the maximum amount of refrigerant that can be received in the liquid separation cavity is smaller than the amount that can be accommodated in the collecting cavity. When the refrigerant flow rate in the air-conditioning pipeline fluctuates, or the refrigerant flow is interrupted, and the refrigerant in the liquid separation cavity all flows into the collecting cavity and no refrigerant continues to flow in for replenishment, it will cause the refrigerant from the liquid separation cavity to the collecting cavity to be "interrupted", thereby causing the refrigerant flow in the flat tube to be interrupted, affecting the heat exchange effect of the heat exchange device; for liquid separation pipeline components used in other occasions, the above-mentioned arrangement of the collecting pipe and the liquid separation pipe will also cause the problem of fluctuation or interruption of liquid replenishment in the liquid application device.

[0063] Please refer again Figures 1 to 9 . The following is a liquid separation pipeline assembly 100 of the first embodiment of the present invention. Specifically, in the present embodiment, the liquid separation pipeline assembly 100 includes a liquid separation tube 11, a collecting tube 21 and a capillary tube 31, and the liquid separation tube 11 and the collecting tube 21 are arranged side by side. The liquid separation tube 11 is hollow inside to form a liquid separation cavity 10, one end of which is blocked, and the other end is connected to the liquid inlet elbow 13 to form a liquid inlet end 12 for the refrigerant to enter the liquid separation cavity 10, and the outer peripheral wall of the liquid separation tube 11 is provided with a plurality of first liquid separation openings 111 along its axial direction; the collecting tube 21 is hollow inside to form a collecting cavity 20, and both ends of the collecting tube 21 are blocked, and the outer peripheral wall on one side is provided with a plurality of second liquid separation openings 211 along the axial direction, and the outer peripheral wall on the other side is provided with a plurality of flat tube grooves 210 for plugging in along the axial direction. 7; There are multiple capillaries 31, which are the same as the number of the first liquid separation opening 111 and the second liquid separation opening 211. The capillaries 31 are hollow inside, and both ends are respectively inserted into the first liquid separation opening 111 and the second liquid separation opening 211, so as to be fixedly connected with the liquid separation tube 11 and the collecting tube 21; when the hollow tube cavity of the capillary 31 is connected with the liquid separation cavity 10 and the collecting cavity 20 including multiple collecting chambers 23, the tube cavity of the capillary 31 and the first liquid separation opening 111 and the second liquid separation opening 211 connected thereto form a liquid separation channel 30.

[0064] Preferably, the distributor tube 11 and the collecting tube 21 are arranged in parallel, and the outer wall of the distributor tube 11 fits with the outer wall of the collecting tube 21, and the distributor tube 11 and / or the collecting tube 21 are welded and fixed to the capillary 31; the baffle element 22 is a baffle plate, and there are multiple baffle plates, the shape of which is consistent with the cross-sectional shape of the inner cavity of the collecting tube 21, and the multiple baffle plates are evenly distributed along the axial direction of the collecting tube 21, and the collecting cavity 20 is divided by multiple baffle plates to form multiple collecting chambers 23 with the same or substantially the same accommodating space.

[0065] The assembly process of the liquid separation pipeline assembly 100 of this embodiment is as follows: first, one end of the multiple capillaries 31 is inserted into the multiple first liquid separation openings 111 one by one, and then the other ends of the multiple capillaries 31 are inserted into the second liquid separation openings 211 one by one, and then the capillaries 31 are welded and fixed to the edges of the first liquid separation openings 111 and the second liquid separation openings 211, that is, the capillaries 31 are welded to the liquid separation tube 11 and the collecting tube 21 to achieve a fixed connection between the liquid separation tube 11 and the collecting tube 21; the liquid separation pipeline assembly 100 after assembly can be fixedly connected to the flat tube 210 or the heat exchange panel 201 including multiple flat tubes 210, and finally, the liquid inlet elbow 13 is inserted into one end of the liquid separation tube 11 to form a liquid inlet end 12, which is used to connect the refrigerant supply device and drain the refrigerant into the liquid separation tube 11.

[0066] Compared with the connection scheme of the prior art that the liquid-distributing pipeline assembly adopts the coaxial sleeve of the manifold and the liquid-distributing pipeline assembly, the liquid-distributing pipeline assembly 100 provided in this embodiment is more convenient to install; the outer diameter of the liquid-distributing pipeline 11 is no longer limited by the inner diameter of the manifold 21, and accordingly, the size of the liquid-distributing cavity 10 is no longer limited by the size of the manifold 20. Therefore, a liquid-distributing pipeline 11 with a larger diameter can be connected side by side with the manifold 21, and the liquid-distributing pipeline 11 with a larger diameter can provide a larger liquid-distributing cavity 10, so that the liquid-distributing cavity 10 has the effect of temporarily storing the refrigerant. Even if the refrigerant flow rate in the air-conditioning pipeline fluctuates or the flow is interrupted, the excess refrigerant stored in the liquid-distributing cavity 10 can continue to flow and supply to the manifold 20, avoiding the phenomenon of interruption when the refrigerant flows to the manifold 20 or the flat tube 210; in addition, the liquid-distributing pipeline 11 with a larger diameter can further reduce the resistance of the refrigerant flowing in the liquid-distributing cavity 10.

[0067] Furthermore, due to the friction of the inner wall of the liquid separator 11, the flow rate of the refrigerant flowing into the liquid separator 11 will decrease, so that the flow rate of the refrigerant located at the liquid inlet end 12 is the largest, and the flow rate of the refrigerant located at one end of the liquid separator 10 relatively far from the liquid inlet end 12 is the smallest. In order to overcome the flow rate change caused by the flow resistance generated by the friction of the inner wall when the refrigerant flows in the liquid separator 10, so as to ensure that the refrigerant flows evenly from the liquid separator 10 into the manifold 20, the amount of refrigerant entering the multiple manifolds 23 is the same or approximately the same. Multiple capillaries 31 generate different resistances to the refrigerant flowing into the manifold 20 from different areas in the liquid separator 10, and the law of the size of the resistance is: along the direction close to the liquid inlet end 12 of the liquid separator pipeline assembly 100, that is, along the direction close to the end of the liquid separator 11 where the refrigerant flows into the liquid separator 11, the resistance of the capillary 31 to the refrigerant flowing into the manifold 20 tends to increase.

[0068] Specifically, the manner of adjusting the resistance of the plurality of capillaries 31 to the flow of the refrigerant in the liquid separation chamber 10 includes: the length of the capillary 31 increases in the direction close to the liquid inlet end 12 of the liquid separation pipeline assembly 100, the inner diameter or the flow channel cross-sectional size of the capillary 31 decreases in the direction close to the liquid inlet end 12, and the distance between two adjacent capillaries 31 decreases in the direction close to the liquid inlet end 12. The longer the length of the capillary 31, the smaller the inner diameter or the flow channel cross-sectional size, the more the number of capillaries 31 connected to each manifold 23 or the denser the capillaries 31 connected to the manifold 23, the greater the flow resistance of the capillary 31 to the flow of the refrigerant into the manifold 20.

[0069] With such arrangement, by adjusting the flow resistance of multiple capillaries 31 at different positions to the refrigerant, the refrigerant flow rate entering the collecting chamber 20 from the liquid separation chamber 10 tends to decrease in the direction close to the liquid inlet end 12, thereby offsetting the attenuation of the flow rate of the refrigerant in the liquid separation chamber 10 due to flow friction. The flow rate of the refrigerant in different areas of the liquid separation chamber 10 is more uniform, thereby ensuring that the refrigerant can enter the collecting chamber 20 evenly from the liquid separation chamber 10, so that the amount of refrigerant entering each collecting chamber 23 is the same or approximately the same, further improving the uniformity of the refrigerant diversion of the liquid separation pipeline assembly 100.

[0070] Specifically, the diameter of the capillary tube 31 is 0.5 mm to 4 mm.

[0071] It is understandable that the means for adjusting the resistance of the multiple capillaries 31 to the flow of the refrigerant in the liquid separation chamber 10 is not limited to any one of the above methods, but may also be a combination of any two of the above methods or a combination of the above three methods.

[0072] In other embodiments, the liquid separation pipeline assembly 100 may not include the capillary 31 . For example, the first liquid separation opening 111 corresponds to the second liquid separation opening 211 , and the liquid separation tube 11 and the manifold 21 fit each other and are fixedly connected by an external bracket.

[0073] Please refer again Fig.10 , and see Figures 11 to 14 . Fig.11 is a schematic structural diagram of a heat exchange device 200 according to a second embodiment of the present invention; Fig.12 for Fig.11 The heat exchange device 200 is shown as a schematic diagram at a first viewing angle; Fig.13 for Fig.12 The schematic diagram of the heat exchange device 200 cut along the BB plane is shown; Fig.14 for Fig.13 The heat exchange device 200 is shown as a partially enlarged view at X.

[0074] The following is a liquid dispensing pipeline assembly 100 according to a second embodiment of the present invention. In the present embodiment, the liquid separation pipeline assembly 100 includes a first tube body 24 and a second tube body 25, both of which are half-tube shells with a concave flow channel for the flow of refrigerant, and can be assembled together to form a liquid separation chamber 10 and a collecting chamber 20 arranged side by side; the shape of the cross section obtained by cutting the first tube body 24 and / or the second tube body 25 in a direction perpendicular to the axis is W-shaped, and the positions of the two grooves in the W-shape correspond to the concave flow channel; the liquid separation channel 30 is opened on the first tube body 24 or the second tube body 25, and connects the liquid separation chamber 10 and the collecting chamber 20; the first tube body 24 and the second tube body 25 block both ends of the collecting chamber 20, and block one end of the liquid separation chamber 10, and the liquid separation pipeline assembly 100 is installed with a liquid inlet elbow 13 at the other end of the liquid separation chamber 10; a plurality of flat tube grooves 27 for plugging in the flat tubes 210 are opened on the outer side of the first tube body 24 along the axial direction, and the flat tube grooves 27 are connected to the collecting chamber 20.

[0075] The axial direction described in this embodiment refers to the axial direction of the columnar liquid separation chamber 10 formed by splicing the first tube body 24 and the second tube body 25; it should be particularly noted that when the liquid separation pipeline assembly 100 is bent as a whole and installed with the bent plate-shaped heat exchange panel 201, the refrigerant flows along a curved trajectory in the liquid separation chamber 10, and the axial direction is the flow direction of the refrigerant in the liquid separation chamber 10.

[0076] Specifically, the first tube body 24 or the second tube body 25 includes a spacer 26 extending along the axial direction of the first tube body 24 or the second tube body 25 or the direction in which the refrigerant flows in the liquid separation chamber 10; the spacer 26 corresponds to the protruding portion in the W-shaped cross-section obtained by cutting the first tube body 24 or the second tube body 25 along the axis; when the first tube body 24 and the second tube body 25 are assembled with each other, the spacer 26 abuts against the inner wall surface of the first tube body 24 or the second tube body 25, thereby separating the liquid separation chamber 10 from the collecting chamber 20; in addition, the first tube body 24 and the second tube body 25 can also be provided with a spacer 26. When the cross-sectional shapes of the two tubes cut along the axis are both W-shaped, the two spacers 26 respectively located on the first tube body 24 and the second tube body 25 abut against each other, so that the cross-sectional shape of the liquid separation pipeline assembly 100 cut along the axial direction is in the shape of the number "8".

[0077] The liquid separation channel 30 is arranged at intervals along the axial direction of the first tube body 24 or the second tube body 25, and a plurality of fluid openings are opened on the spacer 26. When the first tube body 24 and the second tube body 25 are spliced ​​together, the inner wall surface of the concave flow channel and the spacer 26 are surrounded to form a liquid separation chamber 10 and a collecting chamber 20, which respectively correspond to the two circles of the figure "8" in the axial section of the liquid separation pipeline assembly 100. The fluid opening connects the liquid separation chamber 10 and the collecting chamber 20, so there is no need to add a process or device for opening the liquid separation channel 30 after the first tube body 24 or the second tube body 25 is spliced.

[0078] It should be supplemented that, in other embodiments, the mutually abutting areas between the first tube body 24 and the second tube body 25 may also be respectively provided with a plurality of half holes. When the first tube body 24 and the second tube body 25 are spliced ​​together, the positions of the plurality of half holes respectively located between the first tube body 24 and the second tube body 25 correspond to each other, and are spliced ​​together to form a liquid separation channel 30.

[0079] Furthermore, the first tube body 24 or the second tube body 25 further includes a baffle plate, which is multiple and is disposed in the concave flow channel of the first tube body 24 or the second tube body 25, and the shape of the baffle plate is adapted to the flow channel cross-sectional shape of the manifold 20. When the first tube body 24 and the second tube body 25 are assembled with each other, the baffle plates are evenly distributed along the axial direction of the manifold 20, and the manifold 20 is divided by multiple baffle plates to form multiple manifolds 23 with the same or substantially the same accommodating space.

[0080] Preferably, in this embodiment, the number of capillaries 31 is equal to the number of liquid separation channels 30, and the capillaries 31 are inserted into the liquid separation channels 30 and fixed to the inner wall of the liquid separation channels 30 by welding, so as to reduce the risk of the capillaries 31 shaking or detaching from the liquid separation pipeline assembly 100 due to the impact of the refrigerant. Of course, the capillaries 31 are not necessary components of the liquid separation pipeline assembly 100, that is, the liquid separation channel 30 can also be composed of a plurality of fluid ports located on the spacer 26.

[0081] Similar to the first embodiment, the liquid separation pipeline assembly 100 provided in this embodiment, the liquid separation chamber 10 and the manifold chamber 20 are arranged side by side, the size of the liquid separation chamber 10 is also not limited by the size of the manifold chamber 20, and it also has the effect of temporarily storing refrigerant, so it can also achieve continuous flow supply of refrigerant from the liquid separation chamber 10 to the manifold chamber 20, avoiding flow interruption when the refrigerant flows to the manifold chamber 20 or the flat tube 210; in addition, a larger liquid separation chamber 10 can also reduce the resistance to the flow of the refrigerant.

[0082] The assembly process of the liquid separation pipeline assembly 100 of the present embodiment is as follows: first, a plurality of capillaries 31 are inserted into a plurality of fluid through holes provided on the partition 26 of the first tube body 24, and then the first tube body 24 and the second tube body 25 are spliced ​​together so that their respective concave flow channels correspond to each other, and the partition 26 abuts against the inner wall surface of the second tube body 25, and the partition 26 and the inner wall surface of the concave flow channel are arranged to form a liquid separation cavity 10 and a collecting cavity 20, and then the first tube body 24 and the second tube body 25 are welded and fixed by welding; the assembled liquid separation pipeline assembly 100 is fixedly connected to the heat exchange panel 201 comprising a plurality of flat tubes 210, so that the liquid separation pipeline assembly 100 provided in the present embodiment is easier for assemblers to complete quickly, thereby reducing the time required for installation.

[0083] Similar to the first embodiment, the inner wall of the liquid separation chamber 10 will produce friction on the refrigerant, and the flow rate of the refrigerant flowing into the liquid separation chamber 10 will gradually decrease, so that the flow rate of the refrigerant at the liquid inlet end 12 is the largest, and the flow rate of the refrigerant at the end of the liquid separation chamber 10 relatively far from the liquid inlet end 12 is the smallest. Therefore, in order to overcome the flow resistance caused by the friction of the inner wall when the refrigerant flows in the liquid separation chamber 10, it is ensured that the refrigerant flows evenly into the multiple collecting chambers 23. Multiple liquid separation channels 30 produce different resistances to the refrigerant flowing into the collecting chamber 20 from different areas in the liquid separation chamber 10, and the resistance distribution law is: along the direction close to the liquid inlet end 12 of the liquid separation pipeline assembly 100, that is, along the direction close to the refrigerant flowing into the liquid separation chamber 10, the resistance of the liquid separation channel 30 to the refrigerant flowing into the collecting chamber 20 tends to increase.

[0084] Specifically, the manner of adjusting the resistance of the plurality of liquid separation channels 30 to the flow of the refrigerant in the liquid separation chamber 10 includes: the flow area or inner diameter of the plurality of liquid separation channels 30 decreases in the direction close to the liquid inlet end 12, and the distance between two adjacent liquid separation channels 30 decreases in the direction close to the liquid inlet end 12. The smaller the inner diameter or flow area of ​​the liquid separation channel 30, the greater the number of liquid separation channels 30 connected to each manifold 23, or the denser the distribution of the liquid separation channels 30 connected to the manifold 23, the greater the flow resistance of the liquid separation channel 30 to the flow of the refrigerant into the manifold 20.

[0085] With such arrangement, by adjusting the flow resistance of the refrigerant to the multiple liquid separation channels 30 at different positions, the refrigerant flow rate of the liquid separation chamber 10 entering the collecting chamber 20 tends to decrease in the direction close to the liquid inlet end 12, thereby offsetting the effect of the refrigerant flow rate attenuation caused by friction in the liquid separation chamber 10. The refrigerant in different areas of the liquid separation chamber 10 can enter the collecting chamber 20 evenly to ensure that the amount of refrigerant flowing into each collecting chamber 23 is the same or approximately the same, thereby improving the uniformity of the refrigerant diversion of the liquid separation pipeline assembly 100.

[0086] It can be understood that the means for adjusting the resistance of the plurality of liquid separation channels 30 to the flow of the refrigerant in the liquid separation chamber 10 is not limited to any one of the above methods, but may also be a combination of the above two methods.

[0087] Please refer again Fig.15 , and see Figures 16 to 19 . Fig.16 It is a schematic structural diagram of a heat exchange device 200 according to a third embodiment of the present invention; Fig.17 for Fig.16 The heat exchange device 200 is shown as a schematic diagram at a first viewing angle; Fig.18 for Fig.17 The heat exchange device 200 is shown as a schematic diagram cut along the CC plane; Fig.19 for Fig.18 The heat exchange device 200 is shown in a partially enlarged view at position Z.

[0088] The following is a liquid separation pipeline assembly 100 according to the third embodiment of the present invention. Specifically, as a solution to further optimize and improve the liquid separation pipeline assembly 100 according to the second embodiment, the cross-section of the first tube body 24 and / or the second tube body 25 cut perpendicular to the axial direction is C-shaped, and the first tube body 24 and the second tube body 25 can be connected to form a cylindrical cavity; the liquid separation pipeline assembly 100 also includes a liquid separation baffle 40 and a capillary 31, and the liquid separation baffle 40 can be fixed in the cavity formed by the first tube body 24 and the second tube body 25, and divide the cavity into two parts: the first tube body 24 and the liquid separation baffle 40 form a liquid separation cavity 10, and the second tube body 25 and the liquid separation baffle 40 form a manifold cavity 20, and the liquid separation cavity 10 and the manifold cavity 20 are formed. The cavity 20 is located on both sides of the liquid separation baffle 40 and is arranged side by side; both ends of the collecting cavity 20 are blocked, one end of the liquid separation cavity 10 is blocked, and the other end is connected to the liquid inlet elbow 13 to form a liquid inlet end 12 for the refrigerant to enter; a plurality of fluid openings are provided on the liquid separation baffle 40 at intervals along the axial direction of the first tube body 24 or the second tube body 25. When the first tube body 24 is spliced ​​with the second tube body 25, the fluid openings connect the liquid separation cavity 10 and the collecting cavity 20 to form a liquid separation channel 30; the first tube body 24 is also provided with a plurality of spaced flat tube grooves 27 along the axial direction for the flat tubes 210 to be plugged in. When the first tube body 24 is spliced ​​with the second tube body 25, the flat tube grooves 27 are connected to the collecting cavity 20.

[0089] like Fig.16 As shown, the first tube body 24 and the second tube body 25 are spliced ​​to form a cylindrical or substantially cylindrical liquid separation pipeline assembly 100, and the overall shape is more compact and the volume is smaller; when the liquid separation pipeline assembly 100 is connected to the heat exchange panel 201 to form the heat exchange device 200, the size of the heat exchange device 200 in the thickness direction can be reduced.

[0090] The liquid separation baffle 40 can enhance the rigidity of the liquid separation pipeline assembly 100 as a whole, so that the first tube body 24 and the second tube body 25 after splicing are more stable; in addition, the processing method of opening the liquid separation channel 30 on the liquid separation baffle 40 is simpler, for example, the liquid separation channel 30 can be processed by drilling. The number of capillaries 31 is consistent with the number of fluid ports on the liquid separation baffle 40, and they are inserted into the fluid ports. When the first tube body 24 and the second tube body 25 are spliced, the hollow lumen of the capillaries 31 communicates the liquid separation cavity 10 and the manifold cavity 20.

[0091] It can be understood that the liquid-separating baffle 40 is integrally formed with the first tube body 24 or the second tube body 25, or is separately provided with the first tube body 24 or the second tube body 25. When the liquid-separating baffle 40 is integrally formed with the first tube body 24 or the second tube body 25, the liquid-separating baffle 40 can improve the rigidity of the first tube body 24 or the second tube body 25; when the first tube body 24, the liquid-separating baffle 40, and the second tube body 25 are separately provided, the shape and structure of the first tube body 24, the second tube body 25 and the liquid-separating baffle 40 are simpler and easier to form.

[0092] Similarly, in order to overcome the flow resistance caused by the friction of the inner wall when the refrigerant flows in the liquid separation chamber 10, and to ensure that the refrigerant flows evenly into the multiple collecting chambers 23, the multiple liquid separation channels 30 generate different resistances to the refrigerant entering the collecting chamber 20 from different areas in the liquid separation chamber 10, and the resistance distribution rule is also: along the direction close to the liquid inlet end 12 of the liquid separation pipeline assembly 100, the resistance of the liquid separation channel 30 to the refrigerant flowing into the collecting chamber 20 increases. Similar to the second embodiment, the liquid separation channel 30 adjusts the flow resistance of the refrigerant in the liquid separation chamber 10 in the following ways: the flow area of ​​the multiple liquid separation channels 30 decreases along the direction close to the liquid inlet end 12, the distance between two adjacent liquid separation channels 30 decreases along the direction close to the liquid inlet end 12, and a combination of these two ways.

[0093] Similar to the above two embodiments, the liquid separation pipeline assembly 100 provided in this embodiment can also realize the continuous flow supply of refrigerant from the liquid separation chamber 10 to the manifold chamber 20, avoiding the interruption of flow when the refrigerant flows to the manifold chamber 20 or the flat tube 210. The liquid separation pipeline assembly 100 provided by the present invention divides the manifold chamber 20 into a plurality of mutually spaced manifold chambers 23 through the baffle element 22, which can eliminate the phenomenon of secondary mixing or turbulence of the refrigerant between different areas in the manifold chamber 20, and prevent the refrigerants at different positions in the manifold chamber 20 from interfering with each other, thereby overcoming the problem of uneven flow velocity when the refrigerant flows from different positions in the manifold chamber 20 to the multiple flat tubes 210, so that each manifold chamber 23 can evenly collect the refrigerant from the liquid separation chamber 10 and evenly supply it to the multiple flat tubes 210, thereby improving the uniformity of the liquid separation of the refrigerant by the liquid separation pipeline assembly 100.

[0094] The present invention also provides a heat exchange device 200, which mainly includes a heat exchange panel 201 and a liquid separation pipeline assembly 100 as described in any one of the above. The heat exchange panel 201 is a device for heat exchange between a refrigerant and air, and includes a plurality of flat tubes 210 arranged side by side, each flat tube 210 is hollow inside to form a flat tube cavity 211, and the refrigerant enters the flat tube cavity 211 from the manifold 20 and exchanges heat with the external air.

[0095] In addition, the heat exchange panel 201 also includes a side plate 250, a liquid outlet pipe 230 and fins. The liquid separation pipeline assembly 100, the side plate 250 and the liquid outlet pipe 230 are arranged to form a rectangular frame structure, and a plurality of flat tubes are arranged side by side in the rectangular frame structure to form the panel body of the heat exchange panel 201; one end of each flat tube 210 is inserted into the flat tube groove 27 and connected to the manifold 20, and the other end is inserted into the liquid outlet pipe 230 and connected to the inner cavity of the liquid outlet pipe 230; the fins are fixed between two adjacent flat tubes 210 to increase the heat exchange area between the flat tube 210 and the external air; after the refrigerant participates in the heat exchange with the air in the flat tube cavity 211, it flows into and collects in the liquid outlet pipe 230. In order to facilitate the discharge of the refrigerant that has completed the heat exchange from the heat exchange device 200, one end of the liquid outlet pipe 230 is blocked, and the other end is connected to a liquid outlet elbow 240 for discharging the refrigerant.

[0096] Furthermore, as a preferred embodiment of the present invention, the number of flat tubes 210 connected to each collecting chamber 23 in the liquid separation pipeline assembly 100 is equal.

[0097] With such an arrangement, after the liquid separation pipeline assembly 100 completes the uniform liquid separation of the refrigerant, the refrigerant in each collecting chamber 23 can be evenly or approximately evenly distributed to each flat tube 210, so that the multiple flat tubes 210 connected to the same collecting chamber 23 can obtain the same or substantially the same amount of refrigerant, thereby significantly optimizing the distribution amount of the refrigerant in the heat exchange device 200, thereby ensuring that the heat exchange device 200 can perform heat exchange evenly and stably.

[0098] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0099] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, appropriate changes and modifications to the above embodiments are within the scope of protection claimed by the present invention.

Claims

1. A liquid dispensing pipeline assembly, characterized in that: The liquid separation pipeline assembly is provided with a liquid separation chamber (10), a manifold chamber (20) and a liquid separation channel (30); the liquid separation chamber (10) and the manifold chamber (20) are arranged side by side; the liquid separation chamber (10) is used to receive a fluid; the manifold chamber (20) is used to communicate with a flat tube chamber (211) of a heat exchange device (200); and the liquid separation channel (30) is used to communicate with the liquid separation chamber (10) and the manifold chamber (20) so that the fluid in the liquid separation chamber (10) flows into the flat tube chamber (211) through the manifold chamber (20); A plurality of baffle elements (22) are arranged in the manifold (20), and the plurality of baffle elements (22) are evenly distributed along the length direction of the manifold (20), and divide the manifold (20) into a plurality of manifold chambers (23), and each manifold chamber (23) corresponds to a plurality of flat tubes (210); The liquid separation pipeline assembly further comprises a capillary tube (31), wherein the capillary tube (31) is fixedly arranged in the liquid separation channel (30), the capillary tube (31) is hollow inside and respectively connects the liquid separation chamber (10) and the manifold chamber (20); There are a plurality of liquid separation channels (30), the number of the capillaries (31) is the same as the number of the liquid separation channels (30), and each of the capillaries (31) is respectively arranged in one of the liquid separation channels (30), and the liquid inlet end (12) of the liquid separation pipeline assembly is used to connect to a refrigerant supply device and supply refrigerant to enter the liquid separation chamber (10); The lengths of the plurality of capillaries (31) increase in a direction closer to the liquid inlet end (12) of the liquid dispensing pipeline assembly; and / or, The inner diameters of the plurality of capillaries (31) decrease in a direction approaching the liquid inlet end (12) of the liquid separation pipeline assembly; and / or, The distance between two adjacent capillaries (31) decreases in a direction approaching the liquid inlet end (12) of the liquid separation pipeline assembly.

2. The liquid dispensing pipeline assembly according to claim 1, characterized in that: The liquid separation pipeline assembly comprises a first tube body (24) and a second tube body (25), and the first tube body (24) and the second tube body (25) can be assembled with each other to form the liquid separation chamber (10) and the manifold chamber (20).

3. The liquid separation pipeline assembly according to claim 2, characterized in that: The first tube body (24) is provided with the liquid separation channel (30); or, The second tube body (25) is provided with a liquid separation channel (30); or, The first tube body (24) and the second tube body (25) are both provided with half holes, and the half holes respectively located on the first tube body (24) and the second tube body (25) are combined to form the liquid separation channel (30).

4. The liquid dispensing pipeline assembly according to claim 3, characterized in that: The cross section of the first tube body (24) and / or the second tube body (25) cut along a direction perpendicular to the axis is W-shaped.

5. The liquid dispensing pipeline assembly according to claim 2, characterized in that: The liquid separation pipeline assembly also includes a liquid separation baffle (40); the first tube body (24) and the second tube body (25) can be assembled together to form a cavity; the liquid separation baffle (40) is fixed in the cavity and separates the cavity into the liquid separation cavity (10) and the manifold cavity (20); and a liquid separation channel (30) is provided on the liquid separation baffle (40).

6. The liquid dispensing pipeline assembly according to claim 5, characterized in that: The liquid separation baffle (40) is integrally formed with the first tube body (24) or the second tube body (25); or, The liquid separation baffle (40), the first tube body (24) and the second tube body (25) are arranged separately.

7. The liquid dispensing pipeline assembly according to claim 5, characterized in that: The cross-section of the first tube body (24) and / or the second tube body (25) cut along a direction perpendicular to the axis is C-shaped; the first tube body (24) and the liquid separation baffle (40) are arranged to form the liquid separation chamber (10); and the second tube body (25) and the liquid separation baffle (40) are arranged to form the manifold chamber (20).

8. The liquid dispensing pipeline assembly according to claim 1, characterized in that: The capillary (31) is welded and fixed to the inner wall of the liquid separation channel (30).

9. The liquid separation pipeline assembly according to any one of claims 1 to 7, characterized in that: The number of the liquid separation channels (30) is plural, and the flow areas of the plural liquid separation channels (30) decrease in a direction approaching the liquid inlet end (12) of the liquid separation pipeline assembly; and / or, The distance between two adjacent liquid separation channels (30) decreases in a direction approaching the liquid inlet end (12) of the liquid separation pipeline assembly.

10. The liquid dispensing pipeline assembly according to claim 1, characterized in that: There are a plurality of the baffle elements (22), and the plurality of baffle elements (22) are evenly distributed along the length direction of the manifold (20).

11. A heat exchange device, characterized in that: The heat exchange device comprises a flat tube (210) and a liquid separation pipeline assembly as described in any one of claims 1 to 10, wherein the liquid separation pipeline assembly is provided with a flat tube groove (211) for the flat tube (210) to be plugged in, the flat tube (210) is plugged and fixed to the liquid separation pipeline assembly, and the flat tube cavity (211) is connected to the manifold cavity (20).

12. The heat exchange device according to claim 11, characterized in that: There are a plurality of flat tubes (210), and the number of flat tubes (210) connected to each collecting chamber (23) is equal.

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